<template>
<div>
  <!--    面包屑导航-->
  <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>数据统计</el-breadcrumb-item>
    <el-breadcrumb-item>数据报表</el-breadcrumb-item>
  </el-breadcrumb>

  <el-card>
    <!-- 为 ECharts 准备一个具备大小（宽高）的 DOM -->
    <div id="main" style="width: 750px;height:400px;"></div>
  </el-card>
</div>
</template>

<script>
  import echarts from 'echarts';
  import _ from 'lodash';
  export default {
    name: 'Report',
    data() {
      return {
        options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
      }
    },
    //生命周期函数created 会在dom加载时调用
    created() {
    },
    //生命周期函数mounted 会在dom加载完成时调用
    async mounted() {
      // 基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'));

      const {data: res} = await this.$http.get('reports/type/1');
      if (res.meta.status !== 200) return this.$message.error('获取折线图数据失败！');

      const result = _.merge(res.data, this.options);
      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(result);
    },
    methods: {}
  }
</script>

<style scoped>

</style>
